#!/usr/bin/env python3
import os
import socket
from bookish import create_app

app = create_app()


def find_free_port(preferred=5000):
    """Trova una porta libera partendo da preferred."""
    for port in range(preferred, preferred + 100):
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            if s.connect_ex(("127.0.0.1", port)) != 0:
                return port
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind(("", 0))
        return s.getsockname()[1]


if __name__ == "__main__":
    import sys
    from config import DEBUG

    preferred = int(os.environ.get("PORT", "5000"))
    if len(sys.argv) > 1 and sys.argv[1].isdigit():
        preferred = int(sys.argv[1])
    port = find_free_port(preferred)
    print(f"Bookish avviato su http://0.0.0.0:{port} (debug={DEBUG})")
    app.run(host="0.0.0.0", port=port, debug=DEBUG)